WebだけでGitHubからHerokuに空っぽのWebサービスを立ち上げてみた(Node.js) ref: http://qiita.com/LightSpeedC/items/2751b705068449ab37ed

index.js

require('http').createServer((req, res) => res.end('hello')).listen(process.env.PORT || 3000);

package.json

{
  "name": "lightspeedc-qiita-heroku1",
  "version": "0.0.0",
  "description": "lightspeedc-qiita-heroku1",
  "main": "index.js",
  "engines": {
    "node": "6"
  },
  "scripts": {
    "start": "node index",
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "repository": {
    "type": "git",
    "url": "LightSpeedC/lightspeedc-qiita-heroku1"
  },
  "keywords": [
    "heroku"
  ],
  "author": "LightSpeedC",
  "license": "MIT"
}